#!/usr/bin/env python
"""
Example of running a prompt_toolkit application in an asyncssh server.
"""
import asyncio
import logging

import asyncssh
from pygments.lexers.html import HtmlLexer

from prompt_toolkit.completion import WordCompleter
from prompt_toolkit.contrib.ssh import PromptToolkitSSHServer, PromptToolkitSSHSession
from prompt_toolkit.lexers import PygmentsLexer
from prompt_toolkit.shortcuts import ProgressBar, print_formatted_text
from prompt_toolkit.shortcuts.dialogs import input_dialog, yes_no_dialog
from prompt_toolkit.shortcuts.prompt import PromptSession

animal_completer = WordCompleter(
    [
        "alligator",
        "ant",
        "ape",
        "bat",
        "bear",
        "beaver",
        "bee",
        "bison",
        "butterfly",
        "cat",
        "chicken",
        "crocodile",
        "dinosaur",
        "dog",
        "dolphin",
        "dove",
        "duck",
        "eagle",
        "elephant",
        "fish",
        "goat",
        "gorilla",
        "kangaroo",
        "leopard",
        "lion",
        "mouse",
        "rabbit",
        "rat",
        "snake",
        "spider",
        "turkey",
        "turtle",
    ],
    ignore_case=True,
)


async def interact(ssh_session: PromptToolkitSSHSession) -> None:
    """
    The application interaction.

    This will run automatically in a prompt_toolkit AppSession, which means
    that any prompt_toolkit application (dialogs, prompts, etc...) will use the
    SSH channel for input and output.
    """
    prompt_session = PromptSession()

    # Alias 'print_formatted_text', so that 'print' calls go to the SSH client.
    print = print_formatted_text

    print("We will be running a few prompt_toolkit applications through this ")
    print("SSH connection.\n")

    # Simple progress bar.
    with ProgressBar() as pb:
        for i in pb(range(50)):
            await asyncio.sleep(0.1)

    # Normal prompt.
    text = await prompt_session.prompt_async("(normal prompt) Type something: ")
    print("You typed", text)

    # Prompt with auto completion.
    text = await prompt_session.prompt_async(
        "(autocompletion) Type an animal: ", completer=animal_completer
    )
    print("You typed", text)

    # prompt with syntax highlighting.
    text = await prompt_session.prompt_async(
        "(HTML syntax highlighting) Type something: ", lexer=PygmentsLexer(HtmlLexer)
    )
    print("You typed", text)

    # Show yes/no dialog.
    await prompt_session.prompt_async("Showing yes/no dialog... [ENTER]")
    await yes_no_dialog("Yes/no dialog", "Running over asyncssh").run_async()

    # Show input dialog
    await prompt_session.prompt_async("Showing input dialog... [ENTER]")
    await input_dialog("Input dialog", "Running over asyncssh").run_async()


def main(port=8222):
    # Set up logging.
    logging.basicConfig()
    logging.getLogger().setLevel(logging.DEBUG)

    loop = asyncio.get_event_loop()
    loop.run_until_complete(
        asyncssh.create_server(
            lambda: PromptToolkitSSHServer(interact),
            "",
            port,
            server_host_keys=["/etc/ssh/ssh_host_ecdsa_key"],
        )
    )
    loop.run_forever()


if __name__ == "__main__":
    main()
